Window sash lock



NOV. 29, 1932. R SQHUBERT- 1,889,223

WINDOW SASH LOCK Filed May l2, 1952 Iwenor:

Schub@ Patented Nov. 29, '1932 PATENT oFFIcE RUDOLF SCHUBERT, F EASTON,PENNSYLVANIA WINDOW SASH LOCK Application :tiled May 12, 1932. SerialNo. 610,858.

My invention relates to window sash locks, and it relates moreparticularly lto a lock adapted to be used in connection with theordinary type of window construction, in

which a pair of sash are mounted in a frame so as to be verticallyslidable therein, the lock being adapted to secure the lock with one orboth of said sash in a partially open position.

The principal object of my invention is to provide a simple andefficient lock for slidingl window sash, which may be readily appliedlt0 the common formV of window construction at presentinuse, which willpermit the sash to be secured in intermediate positions againstundesired movement. i

A further object of my invention is to provide awindow sash lock of thecharacter aforesaid, which is so constructed and arimproper attempts tomove the sash from ranged as to vordinarily fasten the sash byfrictional engagement, but which will bring` about a. positiveengagement in the event of their locked positions.

The nature and characteristic features of my invention will be morereadily understood from the following description, talien in con-`nection with the accompanying drawing forming part hereof, in whichFigure 1 is a fragmentary sectional view of parts in the positionsassumed under abnormal conditions, that is to say, when an at-v tempt ismade to forcethe sash from their normally locked positions; Y y.

Fig. 3 is a top or plan view ofthe device of my invention, detached;

Fig. 4 is a vertical, centra-1 section thereof; Fig. 5 is a frontelevation thereof; andV Fig. 6 is a side elevationof a modified form ofthe device.` l

Referring now more particularly to` Figs.

' 1 to'5 of the drawing 10 is a window frame of the usual type, in whichthe upper sash 1,1' andlower sash 12 are slidably` mounted.

13 is the lower or meeting rail of the upperI sash, and 14 is the upperor meeting rail of the lower sash.

The device of my invention, shown in detached detail in Figs. 3, 4, and5 of the draw- 5s ing, is preferably mounted on the upper rail l 14ofthe lower sash, and positioned so that aV portion thereof, as will behereinafter eX- plained, will engage the side stile 15 of the uppersash. -If desired, one of the devices 6o may be mounted on each side ofthe window' structure.

, The device preferably comprises a supporting bracket 16, the baseportion 17 of which is adapted to be secured to the sash by `e5 suitablescrews, or other fastening devices, extendingthrough the holes 18provided in the base portion 17 for that purpose.:

The bracket member 16 is also provided with a pair of upwardly extendingwalls 19, between which a clamping member 2O is tiltably mounted bymeans ofa pivot pin 21.

The upper portion of the front end of the clamping member 20 is hollowedout, as at 22, for the mounting therein of a friction roller 23, whichis secured in place by means of a suitable pin 24. The clamping member2O is also so shaped as to provide a tooth 25 immediately abovethefriction roller 23, for a purpose to be presently explained. Y

The rear end of the clamping member 2O isH slotted as at 26, for themounting therein of a finger lever 27 which is pivotally secured to theclamping member 20 by means of a pin 28. rlChe lower end of the fingerlever 27 is485 provided with a cam surface 29, which bears against thebase portion 17 of the bracket member 16, the arrangement being suchthat when the lever 27 is actuated, the clamping member 20 willbe tiltedwith respect to theV 90 bracket member 16, to cause the friction roller23 to bear against the surface ofthe side stile 1 5 of the upper windowsash with the desired degree of pressure.

` The operation of the device may now be explained. The clamping member20, and the finger lever 27 for actuating the same, are normally in suchpositions that the sash may be freelyV raised and lowered. Vhen,however, itis desired to lock the sash in shifted relationship withrespect to each other, (for example with the lower sash slightly raisedor the upper sash slightly lowered, for the purpose of ventilation);after the sash are brought to the desired relative positions, the

linger lever 27 is manipulated to cause the roller 23 to bear againstthe side stile of the upper sash suliiciently to cause the sash to befrictionally bound in the grooves in the window frame in whichtheynormally travel.

It will be noted that when the clamping member E is in the normallocking position, any attempt to move one of the sash with respect tothe other will cause the clamping member 20 to be swung still furtherabout the axis provided by the pivot pin 2l, and if the degree'of forceeXerted is sufficient t0 move one of the sash with respect to the other,the clamping member 20 will be swung sufficient to cause the tooth 25thereof to bite into the side stile l5 of the upper sash, thuspositively preventing any further movement of the sash with respect toeach other. When this action occurs, the lever 27 will fall by gravityand vwill thereafter maintain the tooth in its engagement with the sidestile of the upper sash, and hold the same therein until it issubsequently released by the proper manipulation of the lever 27. Y

In Fig. 6 of the drawing, there is shown a modiiied form of theinvention, in which each of the side walls 19 of the bracket member 16is provided with a slot 30 at the lower forward portion thereof. Thelower marginal edge of this slot 30 is provided with a plurality ofrecesses 3l for the alternative positioning therein of the pin 2l, thuspermitting adjustment of the clamping member 2O to compensate for wearand for irregularity of the window structure.

I claim:

l. A window sash lock comprising a bracket member, a clamping memberpivy otally mounted in said bracket member, a member carried by theclamping member adapted to bear against a portion of a window sash ftolock said sash, and a finger lever pivotally mounted on the clampingmember having' a cani surface bearing vagainst a portion of the bracketmember and adapted when actuated to swing the clamping member positivelyto the locking position.

2. A window sash lock comprising a bracket member, a clamping memberpivotally mounted in said bracketmember, a smooth surfaced membercarriedby the clamp- I ing member adapted to bear against a portion of a windowsash to effect the normal locking of the sash, and a linger leverpivotally mounted with respect to the clamping member having a camsurface bearing against a portion of the bracket member and adapted whenactuated to swing the clamping mem-y l ber to the normal lockingposition; the clamping member having a tooth normally free of engagementwith the window sash but adapted to bite into the same when the sash isshifted when the clamping member is in the normal locking position.

3. A window sash lock comprising a bracket member, a clamping memberpivotally mounted in said bracket member, a smooth surfaced membercarried by the clamping member adapted to bear against a portion of awindow sash to effect the normal locking of the sash and a finger leverpivotally mounted with respect to the clamping member having a camsurface bearing against a portion of the bracket member and adapted whenactuated to swing the clamping member to the normal locking position;the clamping member having a tooth normally free of engagement with thewindow sash but adapted to bite into the same when the sash is shifted`when the clamping member is in the normal locking position, and thelinger lever being freely pivoted in the clamping member whereby thesame will automatically move to a position to maintain the clampingmember in the abnormal locking position.

4. A window sash lock comprising a bracket member adapted to be mountedon the upper or meeting rail of the lower sash of a window structure, aclamping member pivot-,m

ally mounted in said bracket member, a member carried by the clampingmember adapted to bear against the side stile of the upper window sashto lock the sash, and a finger lever pivotally mounted on the clampingmember adapted when actuated to swing the clamp-V "1 ing memberpositively to the locking position.

5. A window sash lock comprising a bracket member adapted to be mountedon the upper or meeting rail of the lower sash of ay window structure, aclamping member pivotally mounted in said bracket member, a smoothsurfaced member carried by the clamping member adapted to bear againstthe side stile of the upper window sash to effect the normal locking ofthe sash, and the clamping member having a tooth normally free ofengagement with the side stile of the window sash but adapted to biteinto the lsame when one of the sash is shifted with respect to the otherwhen the clamping member' is in the normal locking position.

6. A window sash lock comprising a bracket member adapted to be mountedon the upper or meeting rail of the lower sash of a window structure, aclamping member pivotally mounted in said bracket member, a smoothsurfaced member carried by the clamping member adapted to bear againstthe side stile of the upper window sash to effectv the normal locking ofthe sash, and a finger lever pivotally mounted with respect to theclamping member having a cam surface bearing against a portion of thebracket member and adapted when actuated v to swing the clamping memberto the normal locking posi-'i tion; the clamping member having a toothnormally free of engagement with the side stile of the window sash butadapted to bite into the same when one of the sash is shifted withrespect to the other when the clamping member is in the normal lockingposition.

7. A window sash lock comprising a brack et member adapted to be mountedon the upper or meeting rail of the lower sash of a window structure, aclamping member pivotally mounted in said bracket member, a membercarried by the clamping member adapted to bear against the side Vstileof the upper window sash to effect the normal locking of the sash, and afinger lever pivotally mounted with respect to the clamping memberhaving a cam surface bearing against a portion of the bracket member andadapted when actuated to swing the clampin member to the normal lockingposition; ne clamping member having a tooth normally free of engagementwith the side stile of the window sash but adapted to Ibite into thesame when one of the sash is shifted with respect to the l other whenthe clamping member is in the normal locking position, and the fingerlever being freely pivoted in the clamping member whereby the same willautomaticallyv move to a position to maintain the clamping member in theabnormal locking position.

8. A window sash lock comprising a brack et member, a clamping member, amember carried thereby adapted to bear against a portion of a windowsash to lock said sash, a pivot pin for pivotally mounting the clampingmember in the bracket member, the bracket member having a series ofserrations in which the pivot pin is adapted to be alternatively seatedthereby to adjust the position of the clamping member, and a fingerlever pivotally mounted in the clamping member adapted when actuated toswing the clamping member to the locking position.

In testimony whereof, I have hereunto signed my name.

RUDOLF SCHUBERT.

